# CVE-2018-0151: Cisco IOS Software and Cisco IOS XE Software Quality of Service Remote Code Execution Vulnerability

> CVE-2018-0151: Cisco IOS Software and Cisco IOS XE Software Quality of Service Remote Code Execution Vulnerability. CVSS 9.8 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2018-0151
Last updated: 2026-01-12T21:49:09Z

- Published: 2018-03-28 22:00 UTC · Updated: 2026-01-12 21:49 UTC · Assigner: cisco
- CVSS: 9.8 (CVSS 3.1) · Severity: Critical · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS: 14.2%, 97th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2022-03-03, federal due date 2022-03-17, ransomware use: Unknown
- CWE: CWE-119

## Description

A vulnerability in the quality of service (QoS) subsystem of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition or execute arbitrary code with elevated privileges. The vulnerability is due to incorrect bounds checking of certain values in packets that are destined for UDP port 18999 of an affected device. An attacker could exploit this vulnerability by sending malicious packets to an affected device. When the packets are processed, an exploitable buffer overflow condition may occur. A successful exploit could allow the attacker to execute arbitrary code on the affected device with elevated privileges. The attacker could also leverage this vulnerability to cause the device to reload, causing a temporary DoS condition while the device is reloading. The malicious packets must be destined to and processed by an affected device. Traffic transiting a device will not trigger the vulnerability. Cisco Bug IDs: CSCvf73881.

## CISA required action

Apply updates per vendor instructions.

## Affected vendors and products

- n/a: Cisco IOS and IOS XE

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2018-0151)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2018-0151)
- [https://ics-cert.us-cert.gov/advisories/ICSA-18-107-03](https://ics-cert.us-cert.gov/advisories/ICSA-18-107-03)
- [https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-qos](https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-qos)
- [http://www.securityfocus.com/bid/103540](http://www.securityfocus.com/bid/103540)
- [http://www.securitytracker.com/id/1040582](http://www.securitytracker.com/id/1040582)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2018-0151 · Markdown: https://rewindex.com/cve/CVE-2018-0151.md · JSON: https://rewindex.com/api/v1/cves/CVE-2018-0151 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T01:58:51.281Z